Rough running when approaching a stop
Thread Starter
|
Freshman User
Joined: Dec 2007
Posts: 45
Likes: 0
Rough running when approaching a stop
Hi
'85 F150 6cyclinder 4WD
(where do you configure your signature, so I don't have to type this everytime? I looked in the User CP, but I must be missing it)
The truck starts up fine, every time. Driving, the truck feels smooth. Sometimes, when I'm approaching a stop sign, red light, etc. the engine gets real rough. Like it's going to stall. But it's only when I'm slowing down to stop. When I actually stop, the engine is smooth again. What could be the issue(s)?
Thanks.
Jim
'85 F150 6cyclinder 4WD
(where do you configure your signature, so I don't have to type this everytime? I looked in the User CP, but I must be missing it)
The truck starts up fine, every time. Driving, the truck feels smooth. Sometimes, when I'm approaching a stop sign, red light, etc. the engine gets real rough. Like it's going to stall. But it's only when I'm slowing down to stop. When I actually stop, the engine is smooth again. What could be the issue(s)?
Thanks.
Jim
Thread Starter
|
Freshman User
Joined: Dec 2007
Posts: 45
Likes: 0
Originally Posted by jck_strw
'85 F150 6cyclinder 4WD
(where do you configure your signature, so I don't have to type this everytime? I looked in the User CP, but I must be missing it)
(where do you configure your signature, so I don't have to type this everytime? I looked in the User CP, but I must be missing it)
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
The Carter YF 1BBL carb is famous for the baseplate to carb body screws working their way loose. Since most of the later versions also have the air cleaner that bolts to the engine, it tends to hold everything in place rather well, most of the time.
Give the carb body a quick test wiggle. You just may find you have a few (4) loose screws, no pun intended..........
Give the carb body a quick test wiggle. You just may find you have a few (4) loose screws, no pun intended..........
Senior User
Joined: Oct 2006
Posts: 304
Likes: 0
I had the same problem turned out to be a vacumn leak, mine was at the base of the carb there was a crack. Check the carb bolts as suggested but also vacumn lines and maby spray some carb cleaner around the manifold to see if there are any leaks there. If there are any leaks the engine will rev up. Just do a search on vacumn leaks and you can get some more suggestions
Thread Starter
|
Freshman User
Joined: Dec 2007
Posts: 45
Likes: 0
Cool. Thanks for the suggestions. This is my first "automotive adventure" where I'm hoping to fix the things that aren't working, rather than take it to a mechanic. I imagine there will be lots of rough patches along the way, but you'll never learn if you don't try.
Already made my first fix! The bench seat had a big ol' tear, so I grabbed my duct tape and patched that sucker up.
Already made my first fix! The bench seat had a big ol' tear, so I grabbed my duct tape and patched that sucker up.
Trending Topics
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
Also, don't forget to check the brake booster for vacuum leaking. If you hear a whistle sound while you have the brake pedal pressed, it's bad.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
